20951212 has 12 divisors (see below), whose sum is σ = 36729280. Its totient is φ = 10457136.

The previous prime is 20951209. The next prime is 20951233. The reversal of 20951212 is 21215902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1887 + ... + 6742.

Almost surely, 2^20951212 is an apocalyptic number.

It is an amenable number.

20951212 is a deficient number, since it is larger than the sum of its proper divisors (15778068).

20951212 is a wasteful number, since it uses less digits than its factorization.

20951212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240 (or 9238 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 20951212 is about 4577.2493923753. The cubic root of 20951212 is about 275.6785973758.

The spelling of 20951212 in words is "twenty million, nine hundred fifty-one thousand, two hundred twelve".